CN103500590A - Connection structure for inlet of high-temperature gas cooled reactor main helium fan - Google Patents

Connection structure for inlet of high-temperature gas cooled reactor main helium fan Download PDF

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Publication number
CN103500590A
CN103500590A CN201310461147.6A CN201310461147A CN103500590A CN 103500590 A CN103500590 A CN 103500590A CN 201310461147 A CN201310461147 A CN 201310461147A CN 103500590 A CN103500590 A CN 103500590A
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China
Prior art keywords
sealing ring
helium fan
air inlet
upper sealing
temperature gas
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CN201310461147.6A
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CN103500590B (en
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王宏
张勤昭
周惠忠
吴宗鑫
张作义
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Tsinghua University
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Tsinghua University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention discloses a connection structure for an inlet of a high-temperature gas cooled reactor main helium fan. The overall structure consists of a main helium fan inlet sealing structure and a gas feeding header which are connected through a flange, wherein a main body of the main helium fan inlet sealing structure consists of an upper baffle plate, a middle baffle plate and a lower baffle plate which are connected through bolts; grooves are respectively formed in the joint of the upper baffle plate and the middle baffle plate as well as the joint of the middle baffle plate and the lower baffle plate and are respectively used for arranging an assembly model of upper sealing rings and a spring ring and an assembly model of lower sealing rings and a spring ring; sealing of an inlet of the main helium fan is realized under the action of stretching of the two assembly models, and the mounting and the dismounting of the main helium fan are facilitated; a ribbed plate on the gas feeding header is fixed on the inner wall of a steam generator shell, so that centering of the connection structure is realized, and the main helium fan and a steam generator can still work normally under severe working conditions such as earthquake, thermal expansion, cold contraction and the like; therefore, the design requirement of a high-temperature gas cooled reactor is met.

Description

High temperature gas cooled reactor Helium fan import syndeton
Technical field
The present invention relates to the high temperature gas cooled reactor field of engineering technology, be specifically related to a kind of high temperature gas cooled reactor Helium fan import syndeton.
Background technology
High temperature gas cooled reactor is to take graphite as the high-temperature reactor that moderator, helium are cooling medium, be a kind ofly have that inherent safety, generating efficiency are high, purposes advanced nuclear reactor very widely.In January, 2006, in " National Program for Medium-to Long-term Scientific and Technological Development (2006-2020) " of the formal issue of State Council, " large-scale advanced pressurized water reactor and HTGR Nuclear Power Plant " is put into national great special project.Under special support, building the HTGR Nuclear Power Plant demonstration project that an electric power is 200,000 multikilowatts at this at present.
As shown in Figure 1, reactor 001 is separately positioned in two pressure vessels with steam generator 002 HTGR Nuclear Power Plant one loop general structure, with hot gas conduit 004, is connected therebetween, forms the arrangement of " shoulder to shoulder ".Reactor core is by helium gas cooling.Helium gas cooling agent rated pressure 7MPa, rely on Helium fan 003 to drive, and in reactor-loop inside, carries out forced circulation, from reactor core, takes away heat and heat up, and the steam generator 002 of flowing through, pass to the water of secondary circuit by heat and lower the temperature, and forms closed cycle.Helium fan 003 vertical, be arranged on steam generator 002 directly over, Helium fan 003 is arranged in steam generator shell 005 with steam generator 002.
Helium fan 003 is two large key equipments in the high temperature gas cooled reactor nuclear island with steam generator 002.In above-described high-temperature gas-cooled reactor helium gas cooling medium flow process, the import of Helium fan 003 is connected with the outlet of steam generator 002, and its corresponding syndeton is extremely important.At first, syndeton should facilitate the installation and removal of Helium fan 003.Centering, especially Helium fan 003 size when secondly, syndeton should guarantee Helium fan 003 with steam generator 002 installation is large, Heavy Weight.The 3rd, under the pressure of this syndeton in 7.2MPa Helium fan outlet helium, and Helium fan import helium is 7MPa, so syndeton is born the pressure reduction axially made progress, lifting surface area is Helium fan induction pipe area of passage.Because Helium fan induction pipe caliber is large, this pressure is larger.The 4th, this syndeton need guarantee the sealing between Helium fan import, outlet, prevents that exit flow from flowing into import, guarantees higher Helium fan pneumatic efficiency.The 5th, syndeton still can work under earthquake, the bad working environments such as expand with heat and contract with cold, and does not affect the operation of Helium fan and steam generator.
Do not find the particular content about Helium fan import syndeton in current open source literature.
Summary of the invention
The problem existed in order to solve above-mentioned prior art, the object of the present invention is to provide a kind of high temperature gas cooled reactor Helium fan import syndeton, realized the sealing of Helium fan inflow point, and be convenient to the installation and removal of Helium fan, realized that Helium fan is connected with steam generator, ensure Helium fan and the safe and reliable work of steam generator, meet the designing requirement of high temperature gas cooled reactor.
For reaching above purpose, the present invention adopts following technical scheme:
High temperature gas cooled reactor Helium fan import syndeton, be comprised of Helium fan inlet sealing structure 200 and air inlet header 300, and described Helium fan inlet sealing structure 200 is placed in the top of air inlet header 300 and is connected by flange with it;
The main body of described Helium fan inlet sealing structure 200 all is circular upper spacer 21, central dividing plate 22 and lower clapboard 23 by the integral body be bolted and forms, outer radius band first flange 24 of described upper spacer 21, the axle lower end of lower clapboard 23 is hydraucone 28; Described upper spacer 21 and interior upper sealing ring 25 and the turn 27 arranged of the groove of the junction formation of central dividing plate 22, layout lower sealing ring 26 and turn 27 in the groove that the junction of described central dividing plate 22 and lower clapboard 23 forms;
Described upper sealing ring 25 integral body are circular, along circumferentially being divided into three; In the middle of the external diameter periphery axial height of upper sealing ring 25, place has groove towards its internal diameter periphery, and the radial width of groove is less than the radial width of upper sealing ring 25, and two turns 27 embed in this groove vertically side by side; Size and the structure of the size of described lower sealing ring 26 and structure and upper sealing ring are identical, and the assembling of itself and turn is also identical with the assembling of upper sealing ring and turn;
Described air inlet header 300 comprises air inlet header housing 31, above described air inlet header housing 31 axles with the second flange 32, for being connected with the first flange 24 of Helium fan inlet sealing structure 200; Have a plurality of air intake openings 33 on air inlet header housing 31, be connected with the steam generator outlet by pipeline for air inlet header 300; Even circumferential at air inlet header housing 31 welds a plurality of gussets 34, and the other end of described gusset 34 and the inwall of steam generator shell are fixed.
The internal diameter of described upper sealing ring 25 and lower sealing ring 26 is identical with the outer circumference surface diameter of Helium fan induction pipe 100.
The residing groove external diameter of described upper sealing ring 25 and lower sealing ring 26 is greater than the external diameter of upper sealing ring 25 and lower sealing ring 26, between two axial surfaces of two end faces vertically of described upper sealing ring 25 and lower sealing ring 26 and groove of living in, is clearance fit.
The axial inlet end of the Helium fan induction pipe 100 matched with described Helium fan inlet sealing structure 200 is taper entrance point 11.
Described upper sealing ring 25 and lower sealing ring 26 adopt stainless steel graphite Composition spacer.
Compared to the prior art the present invention, has following advantage:
(1), each component shape rule of syndeton, be easy to processing and implement.
(2), can meet the designing requirement of high temperature gas cooled reactor, still can guarantee Helium fan and steam generator reliability service under earthquake, the bad working environments such as expand with heat and contract with cold.
The accompanying drawing explanation
Fig. 1 is HTGR Nuclear Power Plant one loop general structure schematic diagram.
Fig. 2 is embodiment of the present invention one-piece construction figure.
Fig. 3 is Helium fan inlet sealing structure enlarged drawing in the embodiment of the present invention.
Fig. 4 is the wiring layout of upper sealing ring and spring in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
The high temperature gas cooled reactor Helium fan import syndeton one-piece construction figure that the embodiment of the present invention provides as shown in Figure 2, by Helium fan inlet sealing structure 200 and air inlet header 300, formed, along the Helium fan axle, Helium fan inlet sealing structure 200 is placed in the top of air inlet header 300 and is connected by flange with it.
As shown in Figure 3, the main body of Helium fan inlet sealing structure 200 all is circular upper spacer 21, central dividing plate 22 and lower clapboard 23 by the integral body be bolted and forms, outer radius band first flange 24 of described upper spacer 21, for being connected with air inlet header 300; The axle lower end of lower clapboard 23 is hydraucone 28, for air flow guiding; Described upper spacer 21 and interior upper sealing ring 25 and the turn 27 arranged of the groove of the junction formation of central dividing plate 22, layout lower sealing ring 26 and turn 27 in the groove that the junction of described central dividing plate 22 and lower clapboard 23 forms.
As shown in Figure 4, described upper sealing ring 25 integral body are circular, along circumferentially being divided into three; In the middle of the external diameter periphery axial height of upper sealing ring 25, place has groove towards its internal diameter periphery, and the radial width of groove is less than the radial width of upper sealing ring 25, and two turns 27 embed in this groove vertically side by side; Size and the structure of the size of described lower sealing ring 26 and structure and upper sealing ring are identical, and the assembling of itself and turn is also identical with the assembling of upper sealing ring and turn.
Air inlet header 300 is for collecting the gas in steam generator 002 exit, and then water conservancy diversion enters Helium fan 003.Its interior shape can have multiple choices, for example invention " a kind of high temperature gas cooled reactor Helium fan air inlet header " (patent No.: structure ZL201110132336.X) proposed.Emphasis is not in the inner structure of air inlet header 300 here, and be to form with Helium fan inlet sealing structure 200 the essential external structural characteristics of Helium fans and steam generator syndeton, so do not introduce the inner structure of air inlet header 300 here, think that its inside is exactly a cylindrical cavity.As shown in Figure 2, described air inlet header 300 comprises air inlet header housing 31, air inlet header housing 31 is the cylindrical shell with base plate, above air inlet header housing 31 axles with the second flange 32, for being connected with the first flange 24 of Helium fan inlet sealing structure 200; Have a plurality of air intake openings 33 on air inlet header housing 31, air intake opening 33 runs through air inlet header housing 31, for air inlet header 300, by pipeline, with the steam generator outlet, is connected; Border uniform welding at air inlet header housing 31 has a plurality of gussets 34, and the other end of described gusset 34 and the inwall of steam generator shell are fixed.
The internal diameter of described upper sealing ring 25 and lower sealing ring 26 is identical with the outer circumference surface diameter of Helium fan induction pipe 100, guarantees sealing effectiveness.
As the preferred embodiment of the present invention, in order to realize the stretching motion of turn 27 and upper sealing ring 25, lower sealing ring 26, must guarantee its space, therefore, the residing groove external diameter of described upper sealing ring 25 and lower sealing ring 26 is greater than the external diameter of upper sealing ring 25 and lower sealing ring 26, makes upper sealing ring 25 and turn 27 that activity space be arranged diametrically; Should be clearance fit between two axial surfaces of two end faces vertically of described upper sealing ring 25 and lower sealing ring 26 and groove of living in.While avoiding upper sealing ring 25 radially to move and the friction between the surface of upper spacer 21 and central dividing plate 22, reduce the wearing and tearing of upper sealing ring 25 two end faces vertically.The layout of lower sealing ring 26 and upper sealing ring 25 are identical.
As the preferred embodiment of the present invention, for Helium fan induction pipe 100 conveniently inserts and extracts the endoporus of Helium fan inlet sealing structure 200, a taper is cut out at the cylindrical place, axle lower end of Helium fan induction pipe 100, be designed to taper entrance point 11, the axle lower end of cone angle in Helium fan induction pipe 100.
Described upper sealing ring 25 and lower sealing ring 26 adopt stainless steel graphite Composition spacer, guarantee enough intensity when reducing friction.
Principle of work of the present invention is: by Helium fan induction pipe 100 is inserted in the endoporus of Helium fan inlet sealing structures 200, realize being connected of the present embodiment and Helium fan 003 import; The pipeline of the air intake opening 33 by being welded on air inlet header 300, realize being connected of the present embodiment and steam generator 002 outlet.After Helium fan induction pipe 100 inserts the endoporus of Helium fan inlet sealing structure 200, upper sealing ring 25 and lower sealing ring 26 are under the contraction of turn 27, can fit tightly with the outer circumference surface of Helium fan induction pipe 100, radially and axially sealed, prevented that the gas flow in Helium fan exit from entering Helium fan inflow point.
Installation and removal process of the present invention is: when Helium fan is installed, the endoporus that only Helium fan induction pipe 100 need to be inserted to Helium fan import syndeton 200 gets final product; During dismounting, only Helium fan induction pipe 100 need to be extracted and got final product.In the process of installation and removal, utilize the telescopic action of turn 27, upper sealing ring 25 and lower sealing ring 26 are divided into three along even circumferential again simultaneously, can radially move along with the flexible of turn 27, have guaranteed that Helium fan induction pipe 100 can successfully mount and dismount.
Air inlet header 300 of the present invention carries out bolt by flange 32 with the flange 24 of Helium fan inlet sealing structure 200 and is connected, and two flange connections are unsettled.Several gussets 34 and the inwall of steam generator shell 005 distributed along even circumferential by air inlet header 300 fixedly guarantees the centering of the embodiment of the present invention, fixed the position of the embodiment of the present invention simultaneously, solved two problems that flange connections is unsettled.In earthquake, the situation such as expand with heat and contract with cold, the embodiment of the present invention can move with steam generator shell 005, can not affect the operation of Helium fan 003 and steam generator 002.In addition, in the helium atmosphere of the embodiment of the present invention in Helium fan outlet 7.2MPa, and be the 7MPa helium in the air inlet header, so the embodiment of the present invention is born an axial force made progress, the area of passage that the size of power is 0.2MPa pressure reduction and Helium fan induction pipe 100.This power fixedly absorbs by gusset 34 and steam generator shell 005 inwall.As can be seen here, the number of gusset 34 and thickness should meet certain strength and stiffness requirement, guarantee that the embodiment of the present invention can bear difference force, and can guarantee that Helium fan 003 and steam generator 002 still can reliably workings under earthquake, the bad working environments such as expand with heat and contract with cold.

Claims (5)

1. high temperature gas cooled reactor Helium fan import syndeton, be comprised of Helium fan inlet sealing structure (200) and air inlet header (300), it is characterized in that: described Helium fan inlet sealing structure (200) is placed in the top of air inlet header (300) and is connected by flange with it;
The main body of described Helium fan inlet sealing structure (200) all is circular upper spacer (21), central dividing plate (22) and lower clapboard (23) by the integral body be bolted and forms, outer radius band first flange (24) of described upper spacer (21), the axle lower end of lower clapboard (23) is hydraucone (28); Described upper spacer (21) and interior upper sealing ring (25) and the turn (27) arranged of the groove of the junction formation of central dividing plate (22), layout lower sealing ring (26) and turn (27) in the groove that the junction of described central dividing plate (22) and lower clapboard (23) forms;
Described upper sealing ring (25) integral body is circular, along circumferentially being divided into three; In the middle of the external diameter periphery axial height of upper sealing ring (25), place has groove towards its internal diameter periphery, and the radial width of groove is less than the radial width of upper sealing ring (25), and two turns (27) embed in this groove vertically side by side; The size of described lower sealing ring (26) and size and the structure of structure and upper sealing ring are identical, and the assembling of itself and turn is also identical with the assembling of upper sealing ring and turn;
Described air inlet header (300) comprises air inlet header housing (31), in described air inlet header housing (31) axle top, with the second flange (32), for the first flange (24) with Helium fan inlet sealing structure (200), is connected; Have a plurality of air intake openings (33) on air inlet header housing (31), be connected with the steam generator outlet by pipeline for air inlet header (300); Even circumferential at air inlet header housing (31) welds a plurality of gussets (34), and the other end and the steam generator shell inwall of described gusset (34) are fixed.
2. high temperature gas cooled reactor Helium fan import syndeton according to claim 1, it is characterized in that: the internal diameter of described upper sealing ring (25) and lower sealing ring (26) is identical with the outer circumference surface diameter of Helium fan induction pipe (100).
3. high temperature gas cooled reactor Helium fan import syndeton according to claim 1, it is characterized in that: described upper sealing ring (25) and the residing groove external diameter of lower sealing ring (26) are greater than the external diameter of upper sealing ring (25) and lower sealing ring (26), between two axial surfaces of two end faces vertically of described upper sealing ring (25) and lower sealing ring (26) and groove of living in, are clearance fit.
4. high temperature gas cooled reactor Helium fan import syndeton according to claim 1, it is characterized in that: the axial inlet end of the Helium fan induction pipe (100) matched with described Helium fan inlet sealing structure (200) is taper entrance point (11).
5. high temperature gas cooled reactor Helium fan import syndeton according to claim 1, is characterized in that: described upper sealing ring (25) and lower sealing ring (26) employing stainless steel graphite Composition spacer.
CN201310461147.6A 2013-09-30 2013-09-30 High temperature gas cooled reactor Helium fan connection structure for inlet Active CN103500590B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104992731A (en) * 2015-07-13 2015-10-21 清华大学 Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics
US10943704B2 (en) 2015-07-13 2021-03-09 Tsinghua University Baffle structure for channel
CN114001218A (en) * 2021-09-10 2022-02-01 清华大学 Pipe connection member and water feed-in device of vacuum cavity
CN115171934A (en) * 2022-07-28 2022-10-11 中国核动力研究设计院 Atmosphere isolation device for high-temperature gas cooled reactor main helium fan maintenance

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US3887197A (en) * 1972-03-17 1975-06-03 Gen Atomic Co Seal system
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104992731A (en) * 2015-07-13 2015-10-21 清华大学 Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics
US10943704B2 (en) 2015-07-13 2021-03-09 Tsinghua University Baffle structure for channel
CN114001218A (en) * 2021-09-10 2022-02-01 清华大学 Pipe connection member and water feed-in device of vacuum cavity
CN115171934A (en) * 2022-07-28 2022-10-11 中国核动力研究设计院 Atmosphere isolation device for high-temperature gas cooled reactor main helium fan maintenance
CN115171934B (en) * 2022-07-28 2023-09-19 中国核动力研究设计院 Atmosphere isolation device for overhauling main helium fan of high-temperature gas cooled reactor

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